US7670104B2 - Fan with laminar flow element in front of the suction hole - Google Patents

Fan with laminar flow element in front of the suction hole Download PDF

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Publication number
US7670104B2
US7670104B2 US10/576,399 US57639904A US7670104B2 US 7670104 B2 US7670104 B2 US 7670104B2 US 57639904 A US57639904 A US 57639904A US 7670104 B2 US7670104 B2 US 7670104B2
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US
United States
Prior art keywords
radial fan
air inlet
fan according
sensor
bypass
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US10/576,399
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English (en)
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US20070066209A1 (en
Inventor
Martin Geiger
Rudolph Tungl
Reinhold Hopfensperger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebm Papst Landshut GmbH
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Ebm Papst Landshut GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Assigned to EBM-PAPST LANDSHUT GMBH reassignment EBM-PAPST LANDSHUT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TUNGL, RUDOLF, GEIGER, MARTIN, HOPFENSPERGER, REINHOLD
Publication of US20070066209A1 publication Critical patent/US20070066209A1/en
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Publication of US7670104B2 publication Critical patent/US7670104B2/en
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/30—Control parameters, e.g. input parameters
    • F05D2270/301—Pressure

Definitions

  • the invention relates to a radial fan with a laminar flow element and a bypass.
  • the radial fan has a housing and a fan impeller disposed therein, an air inlet and an air outlet, a pressure space being formed between the air inlet and the air outlet.
  • This type of radial fan is often used with burners for domestic technology. With this type of burner, it is essential, especially when the installation works according to the electronic combination principle, for the system parameters to be measured as accurately as possible in order to adapt the respective control precisely to the necessary requirement.
  • valves are controlled pneumatically, the control pressure being provided by the pressure produced by the fan impeller and being gauged at an appropriate point on the air inlet. Due to this it is essential that a minimum working pressure is always maintained in order to apply the required control forces. This means that a greater power input is required for a drive motor than would be necessary in order to provide just the desired heating power.
  • control is provided according to the principle of electronic combination.
  • the control commands for the respective valves are not relayed by pneumatic forces, but as electrical impulses to the valves.
  • the electrical impulses to the valves are controlled by a computer unit.
  • the respective control signals are dependent upon the power released, and this in turn can provide a revolution speed for the drive motor.
  • the amount of fuel to be given is controlled dependent upon the air mass which is recorded by a suitable sensor. In the same way, the mass of fuel, in most cases gas, is recorded and added, controlled by computer, with regard to the quantity.
  • the object which forms the basis of the invention is to provide a radial fan of the type specified with which the most precise possible mass quantity measurement for a subsequent requirements-oriented control can be achieved in an inexpensive manner.
  • a laminar flow element in front of the air inlet a laminar flow element is disposed which, in a bypass formed therein, has a sensor for recording at least one parameter of the medium flowing through the air inlet.
  • the laminar flow element consists of an arrangement of flow channels which are surrounded by an outer cylinder.
  • the bypass has an access gap and a discharge gap which are each formed between the element and the outer cylinder.
  • An inflow is formed between the laminar flow element and the air inlet of the housing for a further medium, this inflow advantageously being evenly distributed over the whole of the air inlet.
  • the further medium is advantageously supplied via a feed element in which a sensor is also provided for gauging predetermined parameters.
  • This sensor is also advantageously disposed in a bypass which extends between an element and an outer ring.
  • the rest of the construction with settling chamber and flow communication of the bypass channel is of a similar form as in connection with the bypass in the laminar flow element.
  • FIG. 1 a sectional view of a schematic representation of a part of a radial fan with housing, fan impeller, air inlet and feed element for further media
  • FIG. 2 a representation of detail I in FIG. 1 ,
  • FIG. 3 a representation of detail II in FIG. 1 ,
  • FIG. 4 a representation of detail III in FIG. 1 .
  • FIG. 5 a representation of detail IV in FIG. 1 .
  • FIG. 6 an alternative embodiment in the section according to FIG. 1 .
  • FIG. 7 a representation of a section along line A-A in FIG. 6 .
  • FIG. 8 a representation of detail V in FIG. 6 .
  • FIG. 1 shows an axial section through the air inlet region of a radial fan 1 according to a first embodiment.
  • the radial fan 1 has a housing 2 with a fan impeller 3 disposed therein.
  • an air inlet 4 disposed substantially centrally on a side wall of the housing 2 and, represented schematically, an air outlet 5 for the radial release of a medium mixture are illustrated.
  • a pressure space 6 extends between the air inlet 4 and the air outlet 5 , and in said pressure space 6 the fan impeller 3 increases the pressure and the speed of the medium which flows through.
  • the air inlet 4 is provided with an intake curve in the conventional manner.
  • a laminar flow element 7 is disposed in front of the air inlet 4 .
  • the laminar flow element has an arrangement of flow channels 10 which are formed by a plurality of passages formed in the laminar flow element 7 . These passages can be circular, but can also have any other suitable cross-sectional form.
  • the flow channels 10 can be formed in an element 12 which is inserted into an outer cylinder 11 .
  • the outer cylinder has a circumferential inner rib 28 on which the element 12 with a shoulder 28 ′ rests.
  • a bypass 8 is formed between the inflow opening 4 ′ of the laminar flow element and the outflow region 29 of the laminar flow element.
  • a sensor 9 is provided along this bypass 8 by means of which the desired parameter of the medium flowing through the bypass is gauged as a reference value for medium passing through the laminar flow element.
  • the bypass is of a design which leads to particular settling of the medium flow, in particular in the region of the sensor.
  • the bypass in the direction of flow is formed by an access gap 13 , a first settling chamber 15 ′, an inflow opening 17 , a sensor channel 16 , an outflow opening 18 , a second settling chamber 15 ′′ and a discharge gap 14 .
  • FIGS. 2 to 5 details I to IV of FIG. 1 are reproduced, enlarged.
  • Detail 1 shows the entry region of the bypass 8 .
  • the outer cylinder 11 On its upper free end the outer cylinder 11 has an inwardly pointing shoulder 11 ′ which extends over the whole area.
  • the laminar flow element 7 is not adjoined, abutted against the shoulder 11 ′ of the outer cylinder 11 , but with its upper face surface 7 ′ and the opposite surface 11 ′′ of the shoulder 11 ′ forms a circumferential annular gap which, as the flow path extends towards the settling chamber 15 ′ is extended.
  • the sensor channel 16 branches off from the settling chamber 15 ′ at an inflow opening 17 .
  • a settling chamber 15 ′′ is formed in turn which is in flow communication with the sensor channel 16 by means of the outflow opening 18 .
  • the settling chamber 15 ′ in turn is in flow communication with the air passage in the outflow region 29 of the laminar flow element by means of the discharge gap 14 .
  • the outflow region 29 narrows to a tip 30 . This tip 30 reduces the cross section of the outflow region to the cross section of the air inlet 4 .
  • the sensor 9 is disposed at an appropriate point in the sensor channel 16 .
  • the sensor 9 can be set so as to gauge different parameters of the medium which flows past, such as for example temperature and flow speed.
  • the senor 9 is disposed on an element 9 ′ which is inserted into a corresponding recess in the outer cylinder 11 .
  • the recess in turn opens towards the sensor channel so that the sensor can come into direct contact with the flowing medium.
  • the tip 30 ends at a predetermined distance in front of the air inlet 4 of the housing 3 .
  • a circumferential annular gap is provided which is in flow communication with a feed element 20 for a further medium by means of an inflow channel 19 .
  • the gap formed between the wall of the tip 30 and the air inlet 4 is preferably wider on the side facing away from the feed element 20 than on the side facing towards the feed element.
  • the additional medium in this case fuel gas, is supplied via a feed element 20 .
  • the feed element 20 has an attachment 31 for a gas pipe. This attachment is in flow communication with a cylinder ring 32 into which an inner ring 33 is inserted.
  • the feed element 20 is also equipped with a sensor 21 which is disposed in a bypass 22 .
  • the bypass construction essentially corresponds to the design which was described in connection with the laminar flow element 7 .
  • the bypass 22 therefore consists essentially of an access gap 26 which is located in the region of the transition between the attachment 31 for the gas pipe and the inner ring 33 .
  • An upper settling chamber 23 ′ adjoins the access gap 26 , and in the upper region an inflow opening 24 for the sensor channel 35 adjoins said settling chamber 23 ′.
  • the sensor channel 35 In its lower region the sensor channel 35 is in flow communication with the lower settling chamber 23 ′′ by means of an outflow 25 .
  • the lower settling chamber 23 ′′ is in flow communication with the outflow opening 36 by means of the discharge gap 27 .
  • the outflow opening 36 passes into the inflow channel 19 which guides the second medium to the air inlet 4 of the housing in the manner described above.
  • FIG. 6 a further embodiment of the laminar flow element according to the invention is shown.
  • the inflow channel 19 of the further medium does not disembogue via an annular gap widening and narrowing again evenly around the circumference, but via a plurality of openings 19 ′ into the region of the air inlet 4 or the tip region of the air inlet.
  • the openings 19 ′ are evenly distributed around the circumference, but have a larger passage cross-section as the distance from the feed element 20 increases. In this way it can also be guaranteed that an even mass flow of gas is supplied to the pressure space over the whole of the air inlet 4 .
  • the invention is not restricted to the embodiments shown and described.
  • only one sensor is provided, but in order to make more accurate readings, several sensors can be disposed, distributed over the whole laminar flow element, the measurement results of which are correspondingly analysed in a computer, and the inflow of gas is correspondingly regulated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Measuring Volume Flow (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
  • Jet Pumps And Other Pumps (AREA)
US10/576,399 2003-10-23 2004-09-24 Fan with laminar flow element in front of the suction hole Expired - Fee Related US7670104B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10349344A DE10349344B3 (de) 2003-10-23 2003-10-23 Gebläse mit Laminar-Element vor der Ansaugöffnung
DE10349344.1 2003-10-23
DE10349344 2003-10-23
PCT/EP2004/010728 WO2005050025A1 (de) 2003-10-23 2004-09-24 Gebläse mit laminar-flow-element vor der ansaugöffnung

Publications (2)

Publication Number Publication Date
US20070066209A1 US20070066209A1 (en) 2007-03-22
US7670104B2 true US7670104B2 (en) 2010-03-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/576,399 Expired - Fee Related US7670104B2 (en) 2003-10-23 2004-09-24 Fan with laminar flow element in front of the suction hole

Country Status (10)

Country Link
US (1) US7670104B2 (de)
EP (1) EP1694967B1 (de)
JP (1) JP4588712B2 (de)
KR (1) KR101128959B1 (de)
AT (1) ATE378516T1 (de)
CA (1) CA2542466C (de)
DE (2) DE10349344B3 (de)
ES (1) ES2295934T3 (de)
PT (1) PT1694967E (de)
WO (1) WO2005050025A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130098485A1 (en) * 2011-10-20 2013-04-25 Honeywell International Inc. Flow sensor with bypass taps in laminar flow element laminarizing channel

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1391676B1 (it) * 2008-11-07 2012-01-17 Sit La Precisa Spa Con Socio Unico Apparecchio bruciatore a gas con pre-miscelazione
IT1395189B1 (it) * 2009-07-22 2012-09-05 Ln 2 Srl Socio Unico Dispositivo miscelatore aria-gas, particolarmente per apparecchi bruciatori a pre-miscelazione.
CN105749394B (zh) * 2009-08-11 2018-12-04 瑞思迈发动机及马达技术股份有限公司 单级轴对称鼓风机和便携式通风机
DE102010010952A1 (de) * 2010-03-10 2011-09-15 Ebm-Papst Landshut Gmbh Pneumatischer Verbund mit Massenausgleich
ITPD20110372A1 (it) * 2011-11-24 2013-05-25 Ln 2 Srl Socio Unico Dispositivo miscelatore aria-gas per bruciatori a gas combustibile con pre-miscelazione
US20160369819A1 (en) * 2014-07-31 2016-12-22 Gentherm Incorporated Air mover inlet interface and cover
GB2529233B (en) * 2014-08-14 2017-09-27 Munster Simms Eng Ltd Burner device for heating apparatus
DE102015109684B3 (de) * 2015-06-17 2016-09-01 Ebm-Papst Landshut Gmbh Düsenvorrichtung mit Staubabscheider und Verfahren zum Messen eines Luftmassenstromes
EP3531017B1 (de) * 2018-02-26 2020-10-21 Honeywell Technologies Sarl Gas-luft-mischvorrichtung für einen gasbrenner und anordnung mit einer gas-luft-mischvorrichtung und einem gebläse
WO2022026214A1 (en) 2020-07-28 2022-02-03 Cummins Inc. Gaseous fuel-air mixer with higher mixture uniformity

Citations (8)

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US2129468A (en) * 1938-01-10 1938-09-06 George L Heck Fan and blower
US2169232A (en) * 1939-04-08 1939-08-15 Westinghouse Electric & Mfg Co Blower apparatus
US2690293A (en) * 1951-01-20 1954-09-28 Westinghouse Electric Corp Fan
US3625629A (en) 1970-06-04 1971-12-07 M K M Corp Proportional blower
WO1990010180A1 (en) 1989-02-22 1990-09-07 Vadelas Pty. Limited Improved zonal control of air conditioning system
DE10017808A1 (de) 1999-11-19 2001-06-13 Motoren Ventilatoren Gmbh Gehäuse für einen Lüfter, insbesondere Radiallüfter
US20040106078A1 (en) 2001-03-23 2004-06-03 Peter Goebel Method and device for adjusting air ratio
WO2004070283A1 (en) 2003-02-07 2004-08-19 A/S Ribe Jernindustri Ventilating aggregate , units, system and methode including units that are easily connectable to other units and safety switch

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DE1551993A1 (de) * 1967-11-06 1970-04-02 Zenkner Dr Ing Kurt Verfahren zum kontinuierlichen Regeln der Leistung von OEl- oder Gasbrennern und Vorrichtung zur Durchfuehrung dieses Verfahrens
DE1929337A1 (de) * 1969-06-10 1970-12-17 Koerting Oel Gasfeuerung Vorrichtung zur Stabilisierung der Kennlinie im Q-H-Diagramm von Geblaesen in der Trommellaeuferbauart,insbesondere Brennergeblaesen
JPH08128609A (ja) * 1994-10-31 1996-05-21 Miura Co Ltd 燃料ガス混合機構を備えた送風機
JPH11141861A (ja) * 1997-11-05 1999-05-28 Gastar Corp ダストトラップ装置
DE19839729A1 (de) * 1998-09-01 1999-12-02 Micro Compact Car Smart Gmbh Gebläse

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2129468A (en) * 1938-01-10 1938-09-06 George L Heck Fan and blower
US2169232A (en) * 1939-04-08 1939-08-15 Westinghouse Electric & Mfg Co Blower apparatus
US2690293A (en) * 1951-01-20 1954-09-28 Westinghouse Electric Corp Fan
US3625629A (en) 1970-06-04 1971-12-07 M K M Corp Proportional blower
WO1990010180A1 (en) 1989-02-22 1990-09-07 Vadelas Pty. Limited Improved zonal control of air conditioning system
DE10017808A1 (de) 1999-11-19 2001-06-13 Motoren Ventilatoren Gmbh Gehäuse für einen Lüfter, insbesondere Radiallüfter
US20040106078A1 (en) 2001-03-23 2004-06-03 Peter Goebel Method and device for adjusting air ratio
WO2004070283A1 (en) 2003-02-07 2004-08-19 A/S Ribe Jernindustri Ventilating aggregate , units, system and methode including units that are easily connectable to other units and safety switch

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Title
International Preliminary Examination Report for PCT/EP2004/010728, dated Sep. 21, 2006. *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130098485A1 (en) * 2011-10-20 2013-04-25 Honeywell International Inc. Flow sensor with bypass taps in laminar flow element laminarizing channel
US20130098484A1 (en) * 2011-10-20 2013-04-25 Honeywell International Inc. Flow sensor with multi-position laminar flow element having integrated bypass channels
US20130098486A1 (en) * 2011-10-20 2013-04-25 Honeywell International Inc. Flow sensor with bypass taps in laminarizing channel and flow restrictor in a bpyass channel
US8826731B2 (en) * 2011-10-20 2014-09-09 Honeywell International Inc. Flow sensor with bypass taps in laminarizing channel and flow restrictor in a bypass channel
US8899108B2 (en) * 2011-10-20 2014-12-02 Honeywell International Inc. Flow sensor with multi-position laminar flow element having integrated bypass channels
US8931338B2 (en) * 2011-10-20 2015-01-13 Honeywell International Inc. Flow sensor with bypass taps in laminar flow element laminarizing channel

Also Published As

Publication number Publication date
KR20060108684A (ko) 2006-10-18
ES2295934T3 (es) 2008-04-16
PT1694967E (pt) 2008-02-11
DE10349344B3 (de) 2005-06-30
DE502004005535D1 (de) 2007-12-27
EP1694967B1 (de) 2007-11-14
JP2007509273A (ja) 2007-04-12
WO2005050025A1 (de) 2005-06-02
KR101128959B1 (ko) 2012-03-27
EP1694967A1 (de) 2006-08-30
US20070066209A1 (en) 2007-03-22
CA2542466A1 (en) 2005-06-02
JP4588712B2 (ja) 2010-12-01
ATE378516T1 (de) 2007-11-15
CA2542466C (en) 2012-01-03

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